Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Seki Yosuke,Exploratory Analysis of Usage Statistics of Dialogue Systems by Visualization,Information and Technology in Education and Learning,2436-1712,Japan Society for Educational Technology & Japanese Society for Information and Systems in Education,2022,2,1,Dev-p001,https://cir.nii.ac.jp/crid/1390293257457302912,https://doi.org/10.12937/itel.2.1.dev.p001